 /*******************************************************************************
  * Copyright (c) 2003, 2007 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.navigator;


 /**
  *
  * An extension activation listener is notified whenever the activation state
  * changese for one or more content extensions.
  *
  *
  * <p>
  * Clients may implement this interface.
  * </p>
  *
  * @since 3.2
  * @see INavigatorActivationService
  * @see INavigatorActivationService#addExtensionActivationListener(IExtensionActivationListener)
  * @see INavigatorActivationService#removeExtensionActivationListener(IExtensionActivationListener)
  */
 public interface IExtensionActivationListener {
     /**
      * @param aViewerId
      * The viewer id of the INavigatorContentService
      * @param theNavigatorExtensionIds
      * A sorted array of updated extension ids
      * @param isActive
      * The new activation state of the extensions
      */
     void onExtensionActivation(String aViewerId,
             String [] theNavigatorExtensionIds, boolean isActive);
 }

